This circuit is from an article about operations in a Radio Electronics magazine from around 1968. The transistors are types of the time and the power is not the greatest.
We found this circuit in the March 1995 issue of Electronics Now magazine. The circuit has a...
This circuit uses a PNP transistor to modulate a low power infrared LED. Observe the polarity of...
The maximum frequency of this circuit depends on the operational, reaching a few hundred...